1# SPDX-License-Identifier: GPL-2.0 2ifdef CONFIG_GCC_PLUGINS 3 __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC)) 4 PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)") 5 6 SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so 7 8 gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so 9 10 gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += latent_entropy_plugin.so 11 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += -DLATENT_ENTROPY_PLUGIN 12 ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY 13 DISABLE_LATENT_ENTROPY_PLUGIN += -fplugin-arg-latent_entropy_plugin-disable 14 endif 15 16 ifdef CONFIG_GCC_PLUGIN_SANCOV 17 ifeq ($(strip $(CFLAGS_KCOV)),) 18 # It is needed because of the gcc-plugin.sh and gcc version checks. 19 gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so 20 21 ifneq ($(PLUGINCC),) 22 CFLAGS_KCOV := $(SANCOV_PLUGIN) 23 else 24 $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler) 25 endif 26 endif 27 endif 28 29 gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += structleak_plugin.so 30 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE) += -fplugin-arg-structleak_plugin-verbose 31 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) += -fplugin-arg-structleak_plugin-byref-all 32 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += -DSTRUCTLEAK_PLUGIN 33 34 gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += randomize_layout_plugin.so 35 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += -DRANDSTRUCT_PLUGIN 36 gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE) += -fplugin-arg-randomize_layout_plugin-performance-mode 37 38 GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y)) 39 40 export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR 41 export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN 42 43 ifneq ($(PLUGINCC),) 44 # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication. 45 GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS)) 46 endif 47 48 KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS) 49 GCC_PLUGIN := $(gcc-plugin-y) 50 GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y) 51endif 52 53# If plugins aren't supported, abort the build before hard-to-read compiler 54# errors start getting spewed by the main build. 55PHONY += gcc-plugins-check 56gcc-plugins-check: FORCE 57ifdef CONFIG_GCC_PLUGINS 58 ifeq ($(PLUGINCC),) 59 ifneq ($(GCC_PLUGINS_CFLAGS),) 60 # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing 61 # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have 62 # issues with 64-bit targets. 63 ifeq ($(ARCH),powerpc) 64 ifeq ($(call cc-ifversion, -le, 0501, y), y) 65 @echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1 66 endif 67 endif 68 ifeq ($(call cc-ifversion, -ge, 0405, y), y) 69 $(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true 70 @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1 71 else 72 @echo "Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5" >&2 && exit 1 73 endif 74 endif 75 endif 76endif 77 @: 78 79# Actually do the build, if requested. 80PHONY += gcc-plugins 81gcc-plugins: scripts_basic gcc-plugins-check 82ifdef CONFIG_GCC_PLUGINS 83 $(Q)$(MAKE) $(build)=scripts/gcc-plugins 84endif 85 @: 86